Multi-sensor system based on phase detection, an LED array, and luminophore-doped xerogels

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Multi-sensor system based on phase detection, an LED array, and luminophore-doped xerogels

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Published

An optical multi-sensor system based on the excited-state lifetime of luminophore doped xerogels is described. The system is based on the novel concept of combining addressable surface-mount light-emitting diode (SM-LED) arrays with doped xerogel thin films; each SM-LED in the array is coated with a different xerogel-based sensor element. Each sensor element exhibits a unique response profile to the target analyte. A prototype system with a 2×2 LED array is presented, with three of the LEDs coated with xerogel-based sensing layers, each layer having a different sensitivity and response profile to oxygen (O2).

Inspec keywords: gas sensors; fibre optic sensors; light emitting diodes; sensor fusion

Other keywords: O2; luminophore-doped xerogels; optical multisensor system; surface-mount light-emitting diode arrays; xerogel-based sensor element; phase detection; doped xerogel thin films; response profile; excited-state lifetime; target analyte; LED array

Subjects: Chemical sensors; Fibre optic sensors; fibre gyros; Chemical sensors; Light emitting diodes; Fibre optic sensors

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